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What problem can occur in an expression construct if a restriction site cuts the promoter region?

Answer and explanation

Correct answer: Gene expression can be affected

The governing concept is promoter-dependent transcription. A promoter is the DNA region where the transcription machinery, including RNA polymerase and associated factors, is recruited to begin copying a gene into RNA. If a restriction enzyme cuts within or disrupts that promoter, its sequence, spacing, or continuity may be damaged. The altered construct may therefore show greatly reduced transcription or no detectable expression, even when the coding sequence itself remains intact. Thus option D is correct. Cutting the promoter does not make DNA automatically good, does not cause the insert to join by itself, and does not prevent an electrophoresis gel from running; those statements describe unrelated effects.

Related tags

PromoterExpression ConstructRestriction DigestionCutting Of DnaProcesses Of Recombinant Dna TechnologyBiotechnologyClass 11 Mcq

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